656625662566 has 16 divisors (see below), whose sum is σ = 1038342850560. Its totient is φ = 310962048840.

The previous prime is 656625662521. The next prime is 656625662569. The reversal of 656625662566 is 665266526656.

656625662566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656625662569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112664496 + ... + 112670323.

It is an arithmetic number, because the mean of its divisors is an integer number (64896428160).

Almost surely, 2^656625662566 is an apocalyptic number.

656625662566 is a deficient number, since it is larger than the sum of its proper divisors (381717187994).

656625662566 is a wasteful number, since it uses less digits than its factorization.

656625662566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225334899.

The product of its digits is 139968000, while the sum is 61.

The spelling of 656625662566 in words is "six hundred fifty-six billion, six hundred twenty-five million, six hundred sixty-two thousand, five hundred sixty-six".